Anti-fluttering transmission apparatus for CD-RW drive head

ABSTRACT

An anti-fluttering transmission apparatus for CD-ROM drive head, which is applied to drive CD-ROM drive head moving back and forth between a transmission bar and a slide base. The anti-fluttering transmission apparatus comprises a connection base. The connection base has a fixing end for fixing the connection base on the slide base. The fixing end extends a connection arm to connect an upside down L-shaped base on the other end. A plurality of arc-raised teeth is formed on the internal y-axis surface of the L-shaped base. At least a spring is arranged between the fixing end of the connection arm and the L-shaped base. When assembling, the x-axis surface of the upper part of the L-shaped base stops on the upper part of the transmission bar. The arc-raised tooth matches with the thread on transmission bar. By the tension force of the spring, the arc-raised tooth can be fixed and matched on the transmission bar for avoiding fluttering.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an anti-fluttering transmission apparatus for CD-RW drive head, having a connection base with elastic pressing force set between CD-RW drive head slide and transmission bar for avoiding fluttering.

[0003] 2. Description of the Prior Art

[0004] CD-ROM drive is very important equipment in audio and video field, which reads diagrams, documents, audio, video, and images in CD-ROM, DVD, CD-R, CD-RW, etc.

[0005] Reading speed is the first priority for CD-ROM drive, but the precision of reading and writing is another target. For increasing searching speed of CD-RW drive head to CD, most of the prior arts are to design a slide base matched on a transmission bar and driven by a motor and the transmission bar. To rotate transmission bar for driving the slide base and then fast moving CD-RW drive head back and forth, thus searching is executed on CD surface. A frame of traditional transmission design is that a fluttering phenomenon is often happened because of transmission bar rotating with two totally different directions. The fluttering easily makes CD-RW head vibration and searching missing, and stability and precision can be affected.

[0006] Another design is a driving gear touched on a side of transmission bar, and slide base of CD-RW drive head are driven back and forth based on the transmission bar rotation. On the other hand, the structure of side touching causes reading and writing mistakes because of matching missing.

SUMMARY OF THE INVENTION

[0007] An objective of the present invention is to provide an anti-fluttering transmission apparatus for CD-RW drive head, having a connection base with elastic pressing force set between CD-RW drive head slide and transmission bar. The arc-raised tooth of the connection base can be fixed and matched on the transmission bar by elastic pressing for avoiding fluttering. So that the present invention promotes the precision of transmission of CD-RW drive head.

[0008] According to the present invention, the anti-fluttering transmission apparatus is set inside CD ROM drive for driving CD-RW drive head. There is a connection base installed between transmission bar and slide base. The connection base includes a fixing end for fixing the connection base on the slide base. The fixing end extends a connection arm to connect an L-shaped base on the other end. The y-axis surface of the L-shaped base has an arc-raised tooth. The x-axis surface of the L-shaped base stops on upper part of the transmission bar when assembling. The arc-raised tooth matches with thread on transmission bar. Further, there is at least a spring set between the fixing end of the connection arm bottom and the L-shaped base. Via tension force of the spring, the arc-raised tooth can be fixed and matched on the transmission bar by elastic pressing for avoiding fluttering.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]FIG. 1 is a perspective view of the CD-ROM drive body.

[0010]FIG. 2 is a plan view of the CD-ROM drive, showing the anti-fluttering transmission apparatus for CD-RW drive head of the present invention.

[0011]FIG. 3 is an exploded view of the anti-fluttering transmission apparatus for CD-RW drive head of the present invention.

[0012]FIG. 4 is the enlarged view showing the connection base of the anti-fluttering transmission apparatus.

[0013]FIG. 5 is a perspective view of the anti-fluttering transmission apparatus.

[0014]FIG. 6 is a cross-sectional view showing the connection of the anti-fluttering transmission apparatus.

DETAILED DESCRIPTION OF THE INVENTION

[0015] Please refer to FIGS. 1 and 2, the anti-fluttering transmission apparatus for CD-RW drive head of the present invention is arranged in an inside body 11 of the CD-ROM drive 10 for the driving head 17. The drive head moves between transmission bar 21 and slide base 18. A connection base 30 is installed between transmission bar 21 and slide base 18 and has elastic pressing force on transmission bar 21.

[0016] As shown in FIG. 1, the inside body 11 of the CD-ROM drive 10 comprises a tray 12 with telescopic function for loading CD. The tray 12 drives the body 11 for internally telescopic moving via a first motor 13. There is a concave 14 on tray 12 for storing CD. A second motor 15 is arranged on central axis of the concave 14 and extends from an inclined slot 16 of concave 14 for rotating CD. The inclined slot 16 is formed on the concave 14. The head 17 and the slide base 18 move along with the slot 16 for reading and writing information on CD surface.

[0017]FIG. 2 is a bottom view of the CD-ROM drive 10 showing the anti-fluttering transmission apparatus arranged between the slide base 18 and the transmission bar 21.

[0018] As showing in the figure, the slide base 18 is set between two slide bars 19 and 20 on the inside body 11. The anti-fluttering transmission apparatus comprises a connection base 30 fixed on one side of slide base 18. The connection base 30 touches and matches with the transmission bar 21. The transmission bar 21 rotates in two different directions along axis by a third motor 22. The two slide bars 19 and 20 are driven by the connection base 30 to move slide base 18 back and forth, so that the head 17 on slide base 18 can read and write information.

[0019] Please refer to FIGS. 3 to 6. The connection base 30 has a fixing end 31 fixed on slide base 18 by a pair of screw bar 35. The upper part of the fixing end 31 extends a connection arm 33. An L-shaped base 32 is placed upside down and connects with an end of the connection arm 33. A plurality of arc-raised teeth 36 is formed on internal side of the L-shaped base 32. At least a spring 34 is arranged between the fixing end 31 of the connection arm 33 and the L-shaped base 32.

[0020] When assembling, the L-shaped base 32 stops on the upper part of the transmission bar 21. Each arc-raised tooth 36 matches with the thread on transmission bar 21. Further, the arc-raised tooth 36 can be fixed and matched on the transmission bar 21 by the tension force of the spring 34 for avoiding fluttering. When the third motor 22 rotating pressing for avoiding fluttering, thus the object is approached.

[0021] When the third motor 22 rotating transmission bar 21 with two different direction along axis, the arc raised to. So that, the connection base 30 is matched with the transmission bar 21 by elastic touching force, thus the slide base 18 drives the head 17 moving along the slide bars 19 and 20 back and forth, head 17 then reads and writes information on CD surface.

[0022] After assembling, upper x-axis surface of L-shaped base 32 stops on the upper part of the transmission bar 21, the arc-raised tooth 36 on y-axis surface of L-shaped base 32 then matches with the transmission bar 21, therefore the present is with easily assembly.

[0023] Although this invention has been disclosed and illustrated with reference to particular embodiments, the principles involved are susceptible for use in numerous other embodiments that will be apparent to persons skilled in the art. This invention is, therefore, to be limited only as indicated by the scope of the appended claims. 

What is claimed is:
 1. An anti-fluttering transmission apparatus for CD-ROM drive head which is moved back and forth between a transmission bar and a slide base, the anti-fluttering transmission apparatus comprising a connection base, wherein: the connection base having a fixing end for fixing the connection base on the slide base by a pair of screw bars; the upper part of the fixing end extending a connection arm to connect an L-shaped base on the other end; a plurality of arc-raised teeth formed on internal y-axis surface of the L-shaped base; and at least a spring arranged between the fixing end of the connection arm and the L-shaped base; when assembling, the x-axis surface of the upper part of the L-shaped base stopping on the upper part of the transmission bar, each of the arc-raised tooth matching with the thread on the transmission bar, so that the further, arc-raised tooth can be fixed and matched on the transmission bar by tension force of the spring. 